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NFI4
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: economic region
unit: 1000 ha
unit of evaluation: accessible forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: 1.4 x 1.4 km grid
state2009/17
avalanches SilvaProtect
n/ainside perimeteroutside perimetertotal
economic regiontime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %
Western Juran/a0.0.0.0.0.0.0.0.
less than 10 years ago67.041.63513.21181.94
11-20 years ago21.790.6584.62026.98
21-30 years ago9.8140.8502.13012.712
31-40 years ago6.4171.0441.4388.914
41-50 years ago4.4210.0.1.3385.818
over 50 years ago3.9220.6584.2218.714
total113.324.62026.88144.81
Eastern Juran/a0.21000.0.0.0.0.2100
less than 10 years ago23.870.0.1.73525.56
11-20 years ago10.9120.0.1.43712.411
21-30 years ago2.9260.0.0.21003.125
31-40 years ago1.3400.0.0.4711.735
41-50 years ago0.8500.0.0.0.0.850
over 50 years ago1.7340.0.0.4712.231
total41.630.0.4.12245.72
Western Plateaun/a0.21000.0.0.0.0.2100
less than 10 years ago26.860.0.3.62330.45
11-20 years ago7.2160.0.0.6577.815
21-30 years ago3.7230.0.0.21003.923
31-40 years ago1.8330.0.0.21002.031
41-50 years ago0.9500.0.0.4701.340
over 50 years ago1.5370.0.0.0.1.537
total42.030.0.5.01947.02
Central Plateaun/a0.0.0.0.0.0.0.0.
less than 10 years ago47.540.0.5.41852.83
11-20 years ago9.3130.0.2.13011.512
21-30 years ago1.4370.0.0.8502.130
31-40 years ago0.6580.0.0.8501.437
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.8500.0.0.4701.241
total59.530.0.9.41369.01
Eastern Plateaun/a0.0.0.0.0.0.0.0.
less than 10 years ago75.430.0.3.32478.73
11-20 years ago15.0110.0.1.04516.010
21-30 years ago5.6180.0.1.0456.617
31-40 years ago2.0310.0.0.0.2.031
41-50 years ago1.0450.0.0.0.1.045
over 50 years ago1.2410.0.0.21001.338
total100.220.0.5.519105.61
Western Pre-Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago6.7171.8348.31416.99
11-20 years ago3.4240.9454.4218.714
21-30 years ago1.6360.4712.0294.021
31-40 years ago1.0450.6581.7333.224
41-50 years ago1.2410.4711.3372.825
over 50 years ago1.7340.21002.7284.621
total15.6104.32120.4840.33
Central Pre-Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago23.480.94523.2847.55
11-20 years ago11.5132.5298.81522.99
21-30 years ago3.0260.5573.8237.316
31-40 years ago3.7230.21001.5385.519
41-50 years ago2.3290.4711.1453.823
over 50 years ago3.9221.0453.2258.115
total47.955.61841.6595.12
Eastern Pre-Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago15.0110.85014.81130.67
11-20 years ago7.9150.4718.11516.410
21-30 years ago2.8270.4702.8276.018
31-40 years ago2.1300.0.2.9265.019
41-50 years ago1.6350.9441.0453.523
over 50 years ago3.5240.21002.5276.218
total32.962.72632.1667.73
Northwestern Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago5.8184.4217.61617.79
11-20 years ago2.8261.2413.6237.615
21-30 years ago2.7271.8333.6238.115
31-40 years ago1.2410.6582.1313.922
41-50 years ago1.6350.4702.5284.520
over 50 years ago3.6241.4384.2219.314
total17.61010.01323.5851.13
Central Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago2.1291.1412.6275.817
11-20 years ago1.9311.1391.4374.419
21-30 years ago1.4360.8501.0443.223
31-40 years ago0.8500.21000.6571.535
41-50 years ago0.6560.6570.4711.535
over 50 years ago2.7251.0440.8504.419
total9.5124.8186.71520.95
Northeastern Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago2.0302.1314.7208.814
11-20 years ago1.5361.1413.1235.817
21-30 years ago1.3410.5581.9313.722
31-40 years ago0.5560.5560.8511.831
41-50 years ago0.4720.4720.6591.537
over 50 years ago1.8331.7351.6335.119
total7.6156.41612.71026.65
Southwestern Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago4.6215.01912.41222.19
11-20 years ago3.5234.3216.31714.111
21-30 years ago1.6352.1294.7208.315
31-40 years ago2.0311.6352.9266.517
41-50 years ago1.8331.8334.4218.015
over 50 years ago11.0138.21520.9940.06
total24.5822.9851.6599.02
Southeastern Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago14.0113.02611.91328.98
11-20 years ago10.0143.92212.11226.08
21-30 years ago6.1182.6289.11417.910
31-40 years ago4.7202.0315.51812.212
41-50 years ago2.8271.9323.3248.015
over 50 years ago13.0123.52311.91228.48
total50.6517.01053.75121.32
Southern Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago3.8231.14110.81315.811
11-20 years ago2.6280.6585.7198.915
21-30 years ago1.0451.0456.1188.015
31-40 years ago1.8330.8505.4198.015
41-50 years ago1.7351.2418.21511.013
over 50 years ago9.3147.21654.9571.44
total20.1911.91291.13123.12
Switzerlandn/a0.4710.0.0.0.0.471
less than 10 years ago317.9222.09123.54463.42
11-20 years ago109.4416.61163.25189.23
21-30 years ago44.8710.91339.2794.94
31-40 years ago29.987.51626.2963.65
41-50 years ago21.1108.01624.4953.56
over 50 years ago59.6625.19107.84192.43
total583.0190.14384.321057.41
© WSL, Swiss National Forest Inventory, 18.06.2020 #863128/329459
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